Battery i.e. electrochemical battery, charge-level ascertaining method for vehicle, involves coordinating amplitude and/or phase position and/or resonant frequency with charge-level of battery in evaluation unit

摘要

The method involves supplying an alternating voltage signal (Ug) to a battery (2) by a signal generator (3), where a frequency of the alternating voltage signal is 1 mega hertz. An output signal (U-Ra) is sensed and evaluated by an evaluation unit (4) based on a criterion, which is an amplitude of a voltage and/or a phase position at a predefined frequency and/or a resonant frequency. The amplitude and/or the phase position and/or the resonant frequency is coordinated with a charge-level of the battery in the evaluation unit. An independent claim is also included for a device for ascertaining a charge-level of a battery of a vehicle.